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/* -*- C++ -*- */
//=============================================================================
/**
* @file Msg_WFMO_Reactor.h
*
* $Id$
*
* @author Beskrovny Evgeny <evgeny_beskrovny@icomverse.com>
* @author Irfan Pyarali <irfan@cs.wustl.edu>
*/
//=============================================================================
#ifndef ACE_MSG_WFMO_REACTOR_H
#define ACE_MSG_WFMO_REACTOR_H
#include "ace/pre.h"
#include "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if defined (ACE_WIN32) && !defined (ACE_LACKS_MSG_WFMO)
#include "ace/WFMO_Reactor.h"
/**
* @class ACE_Msg_WFMO_Reactor
*
* @brief An OO event demultiplexor and event handler dispatcher for
* Win32 <MsgWaitForMultipleObjects>.
*
* The ACE_Msg_WFMO_Reactor is an OO event demultiplexor and
* event handler Reactor. It differs from <ACE_WFMO_Reactor> by
* its ability to react on Windows messages. It is needed when
* the task should serve also as a COM/DCOM server.
*/
class ACE_Export ACE_Msg_WFMO_Reactor : public ACE_WFMO_Reactor
{
public:
// = Initialization and termination methods.
/// Initialize <ACE_Msg_WFMO_Reactor> with the default size.
ACE_Msg_WFMO_Reactor (ACE_Sig_Handler * = 0,
ACE_Timer_Queue * = 0);
/**
* Initialize <ACE_Msg_WFMO_Reactor> with size <size>. Two slots will be
* added to the <size> parameter which will store handles used for
* internal management purposes.
*/
ACE_Msg_WFMO_Reactor (size_t size,
int unused = 0,
ACE_Sig_Handler * = 0,
ACE_Timer_Queue * = 0);
/// Close down the ACE_Msg_WFMO_Reactor and release all of its resources.
virtual ~ACE_Msg_WFMO_Reactor (void);
/**
* This event loop driver blocks for up to <max_wait_time> before
* returning. It will return earlier if timer events, I/O events,
* window events, or signal events occur. Note that <max_wait_time>
* can be 0, in which case this method blocks indefinitely until
* events occur.
*
* <max_wait_time> is decremented to reflect how much time this call
* took. For instance, if a time value of 3 seconds is passed to
* handle_events and an event occurs after 2 seconds,
* <max_wait_time> will equal 1 second. This can be used if an
* application wishes to handle events for some fixed amount of
* time.
*
* <MsgWaitForMultipleObjects> is used as the demultiplexing call
*
* Returns the total number of <ACE_Event_Handler>s that were
* dispatched, 0 if the <max_wait_time> elapsed without dispatching
* any handlers, or -1 if an error occurs.
*
* The only difference between <alertable_handle_events> and
* <handle_events> is that in the alertable case, MWMO_ALERTABLE is
* passed to <MsgWaitForMultipleObjects> for the <bAlertable>
* option.
*/
virtual int handle_events (ACE_Time_Value *max_wait_time = 0);
virtual int alertable_handle_events (ACE_Time_Value *max_wait_time = 0);
/**
* This method is just like the one above, except the
* <max_wait_time> value is a reference and can therefore never be
* NULL.
*/
virtual int handle_events (ACE_Time_Value &max_wait_time);
virtual int alertable_handle_events (ACE_Time_Value &max_wait_time);
protected:
/// Wait for timer and I/O events to occur.
virtual int wait_for_multiple_events (int timeout,
int alertable);
/// Check for activity on remaining handles.
virtual DWORD poll_remaining_handles (size_t index);
/// Dispatches window messages.
virtual int dispatch_window_messages (void);
};
#endif /* ACE_WIN32 && !ACE_LACKS_MSG_WFMO */
#if defined (__ACE_INLINE__)
#include "ace/Msg_WFMO_Reactor.i"
#endif /* __ACE_INLINE__ */
#include "ace/post.h"
#endif /* ACE_MSG_WFMO_REACTOR_H */
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